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The official app of Major League Baseball, long the best, most intensively developed sports app on any platform, is now even better. With a single account, you can now access games and other content through a range of gadgets—an iPhone, iPad, or Android device. You can also use the app to access the rich offerings of your MLB-TV subscription. And the features are polished to the point where they'll delight fans of both baseball and apps.

At Bat 13

Price: Free download; $20 for season pass; included in $130 MLB.TV premium package. Features: Watch game of the day; listen to any game. Access MLB.TV subscription to watch any out-of-market game. Loads of stats, videos. Website:mlb.com/mobile/atbat

We love the expanded, customizable push notifications to track not just teams but also changes in league standings and breaking news. We're not Texas fans, for example, but one recent night our iPad popped up an alert when the Rangers' Yu Darvish had a perfect game still going in the seventh inning. So we tapped the app, called At Bat 13, and watched the heady Dallas TV broadcast until the heart-breaking moment when Darvish gave up a single—through his legs—with two outs in the ninth. Score a big one for mobility.

The app, which starred during the introduction of Apple's App Store in 2008, has become much more tappable. Your team's video highlights are now directly available on the app home screen, for instance, and a new library of classic games extends TV broadcasts back to Game 7 of the 1952 World Series.

Major League Baseball has deftly played hand in glove with consumer tech for decades. The two are now so intertwined that it's hard to tell whether America's pastime is watching baseball or staring at small screens. It's shaping up as a tie game.